Show:
Now Hear This!
Ride the "Wave"
My Dear Ear
Move It!
Dr. Ear
100
What causes sound?
When something moves or vibrates.
100
What does a tall sound wave indicate? Short wave?
Loud volume (amplitude), Quiet volume (amplitude)
100
When sound enter the outer ear, what carries it to the eardrum?
ear canal
100
What are the two main types of energy? Define them.
Potential- stored energy Kinetic- energy in motion, of movement
100
Why do we have earwax?
Along with cilia, it catches foreign objects and prevents them from entering the ear.
200
Define "medium"
An object that sound travels through to get from one source to another
200
What does the amount of space between waves mean?
Close space means high pitch, Far space means lows pitch
200
What is the job of the eardrum?
Vibrates
200
Define "energy"
The ability to do work
200
How does constant loud sound cause loss of hearing?
Cilia (tiny hairs) in cochlea become pressed flat.
300
Name the three mediums that sound travels from in order from quickest to slowest.
solid, liquid, air
300
If you were to whisper in a squeaky voice, what would your sound wave look like?
Sort waves that are close together
300
What three tiny bones vibrate after the eardrum? List them in the order they occur in the ear.
hammer, anvil, stirrup
300
Name at least 2 types of energy (not potential or kinetic).
thermal (heat), chemical, electromagnetic, electrical
300
What causes swimmer's ear?
After contact with water, some water gets in ear canal, gets invaded by bacteria, infection festers, and pain is caused.
400
Name a musical instrument that demonstrates pitch wonderfully. How does it change pitch?
Xylophone: short bars make high pitch, long bars make low pitch Guitar: short strings make high pitch, long strings make low pitch
400
How do we produce sound to speak?
Our vocal chords vibrate.
400
Describe the cochlea and the job it has.
snail-like organ filled with fluid, maintains body balance
400
Define the "Law of Conservation of Energy"
Energy can never be made or destroyed, only change form.
400
What causes blocked ear?
An ear pocket inside the middle ear changes due to air pressure. If the pressure on both sides of the eardrum is not equal, the ear feels blocked.
500
What solid medium does sound travel through faster and why? Glass or Steel?
Steel. The molecules in steel are closer together, more dense. Sound bounces off these compact molecules quicker.
500
Why is there no sound in space?
It is a vacuum, has no medium for sound to travel.
500
How does the auditory nerve work?
It picks up electrical signals from the cilia inside the cochlea and sends it to the brain.
500
Explain why a Jack-in-the-box is a good example of mechanical energy.
"Mechanical" means both potential and kinetic energy. Winding it up is potential, Jack popping out is kinetic.
500
Name 2 causes for a blocked Eustachian tube.
common cold, allergies, hay fever